Wednesday, May24, 2017

Marine Weather and Tides
St. Martin, MS

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:55AMSunset 7:49PM Tuesday May 23, 2017 11:13 PM CDT (04:13 UTC) Moonrise 4:26AMMoonset 5:32PM Illumination 2% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ532 Mississippi Sound- 947 Pm Cdt Tue May 23 2017
.small craft advisory in effect through late Wednesday night...
Rest of tonight..West winds 10 to 15 knots increasing to 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the late evening.
Wednesday..Northwest winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms in the morning.
Wednesday night..Northwest winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Thursday..West winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Thursday night..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday night..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Saturday..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Saturday night..South winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Sunday..South winds 10 to 15 knots. Waves 2 to 4 feet. Slight chance of showers and Thunderstorms.
Sunday night..Southwest winds 15 to 20 knots. Waves 3 to 5 feet. Chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 947 Pm Cdt Tue May 23 2017
Synopsis..A cold front will move through the area late tonight and early Wednesday morning allowing high pressure to settle over the coastal waters later Wednesday into Thursday. High pressure will then move east by Friday into the weekend as low pressure develops over the southern plains.

7 Day Forecast for Marine Location Near St. Martin, MS
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location: 30.41, -88.9     debug

Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 240120
area forecast discussion
national weather service new orleans la
820 pm cdt Tue may 23 2017

Sounding discussion...

the sounding this evening has some instability present with 1300
j kg of mixed layer cape. A weak elevated inversion is near 800
mb. A couple storms could be strong with the cold front passage
later overnight, but there is really not much shear due to light
winds through 700 mb. Though the upper level jet is strong with
115 kts at 230 mb. Pw is near average at 1.2 inches.


Prev discussion issued 442 pm cdt Tue may 23 2017
short term (tonight through Thursday night)...

water vapor satellite imagery showed the deepening longwave trough
over central north america. The smaller shortwave feature of
interest was a trough moving southeast over the panhandle region
of oklahoma and texas and the enhanced upper level divergence to
its southeast over north central, central and northeast texas.

While the weaker frontal boundary remains stalled across the
central gulf coast region, the reinforcing main cold front will
move fairly quickly through the ark-la-tex region later this
afternoon and evening and then continue southeast through the
forecast area later this evening through the overnight and early
morning hours on Wednesday as the main upper trough swings east
into the lower mississippi valley. A blend of various synoptic
scale and mesoscale convective allowing models suggest there will
be scattered to numerous showers and generally isolated to locally
scattered thunderstorms ahead of the main cold front later this
evening and overnight. Speed shear and slight to moderate
instability will be favorable for a few stronger to marginally
severe thunderstorms to develop in some areas with a bit more
confidence in more robust storms near the south louisiana coast
and in the coastal waters.

Drier and cooler air will be impressive for late may behind the
cold front as high pressure builds over the region and as the
upper trough moves east of the region Wednesday afternoon. Lows
in the upper 50s to mid 60s are expected late tonight, then highs
should be generally in the mid 70s to around 80 on Wednesday. The
coolest lows are expected Wednesday night with readings in the
lower to mid 50s over most northern areas with upper 50s and lower
60s over most of the south. The surface high will cover much of
the gulf of mexico and north gulf coast region Thursday before
moving east Thursday night.

Long term (Friday through Tuesday)...

enjoy the drier, cooler conditions while you can as the airmass
will be quite transient with return flow already back over the
region early Friday morning. The pattern will be progressive with
a shortwave trough moving from the northwest states east-southeast
into the central u.S. Upper to mid mississippi valley over the
weekend. This will push a frontal boundary south that will be
stalling, most likely north of the forecast area. Temperatures
will be warming above normal with many most areas in the upper 80s
to lower 90s Friday through Saturday, except for some cooler mid
80s in some coastal areas. The first part of the holiday weekend
from Friday night through Saturday night looks dry at this point,
however the rise in deeper layer moisture will moist likely
support a decent chance of showers and thunderstorms with daytime
heating Sunday and memorial day. 22 td

conditions were trending towardsVFR at most locations with at
least scattered clouds near fl020-030 and higher clouds fl040-050.

Will probably lose much of the lower cloud cover briefly around
sunset. Isolated to scattered convection associated with main
upper level impulse should move across most terminals after 06z,
exiting the gpt terminal area by about 14z based on mesoscale
modeling. Will carry prob30 for now for the tsra as development is
not certain for a particular terminal.VFR conditions expected to
move into western terminals by 18z Wednesday. 35

a fairly strong late may cold front will shift winds from
southwest west to northwest Wednesday and remain elevated. Before
that, there will be a slight easing of wind speeds tonight with
some areas easing to around 15 knots or 10 to 15 knots for a
short period. But as the cold front moves through the coastal
waters, winds will once again rise to 15 to 25 knots. Changed up
the small craft advisory headlines timing somewhat to account for
latest data trends and wind forecasts. An area of high pressure
is then expected to move from west to east across the north gulf
Wednesday night and Thursday which will bring a brief period of
lighter winds Thursday afternoon and evening, then a return of
moderate south winds is expected late Thursday night into Friday
into the weekend. 22 td
decision support...

dss code... Blue.

Deployed... None.

Activation... None.

Activities... Monitoring mississippi river flooding.

Decision support services (dss) code legend
green = no weather impacts that require action
blue = long fused watch warning advisory in effect or high
visibility event
yellow = heightened impacts with short fused
watch warning advisory issuances; radar support
orange = high impacts - slight to moderate risk severe; nearby
tropical events; hazmat or other large episodes
red = full engagement for moderate tonight risk svr
and or direct tropical threats; events of national

Preliminary point temps pops
Mcb 59 76 52 83 60 10 0 0
btr 61 77 55 84 50 10 0 0
asd 64 79 56 84 50 20 0 0
msy 66 79 60 84 50 10 0 0
gpt 66 80 59 84 40 30 0 0
pql 63 79 55 83 50 30 0 0

Lix watches warnings advisories
La... None.

Gm... Small craft advisory from 1 am to 10 pm cdt Wednesday for gmz550-

Small craft advisory until 1 am cdt Thursday for gmz532-536-538-

Ms... None.

Gm... Small craft advisory from 1 am to 10 pm cdt Wednesday for gmz552-

Small craft advisory until 1 am cdt Thursday for gmz536-538-555-

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 18 mi44 min 78°F
DKCM6 - 8741501 - Dock C, Pascagoula, MS 18 mi44 min W 7 G 12 79°F 1006.6 hPa
RARM6 - 8741094 - Range A rear, Pascagoula, MS 21 mi44 min W 11 G 15 79°F 1006.2 hPa
ULAM6 - 8741041 - Dock E. Port of Pascagoula, MS 21 mi44 min 79°F
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 23 mi44 min NW 6 G 7 74°F 79°F1006.5 hPa
PTBM6 - 8741003 - Petit Bois Island, MS 25 mi44 min WSW 12 G 14 78°F 1007.5 hPa
GDXM6 - Grand Bay Reserve, MS 26 mi89 min SW 8 78°F 1007 hPa73°F
42067 - USM3M02 29 mi94 min WSW 7.8 G 9.7 79°F 3 ft1006.1 hPa72°F
OSTF1 - Stennis Test Facility 38 mi84 min Calm G 0 72°F 1007 hPa (+1.3)71°F
KATA1 - Katrina Cut, AL 38 mi74 min SW 16 78°F 1005.8 hPa (+1.0)
CRTA1 - Cedar Point, AL 41 mi44 min SW 16 78°F 1006.4 hPa
DPIA1 - Dauphin Island, AL 45 mi74 min SSW 11 G 18 78°F 1006 hPa (+1.3)
MBLA1 - Middle Bay Light, AL 47 mi74 min SW 17 78°F 1006.4 hPa (+1.7)
FMOA1 - 8734673 - Fort Morgan, AL 48 mi44 min WSW 19 G 21 77°F
MCGA1 - 8736897 - Coast Guard Sector Mobile, AL 48 mi44 min SW 2.9 G 6 75°F 79°F1007.1 hPa
PTOA1 49 mi44 min 76°F 73°F

Wind History for West Pier, Port of Gulfport, MS
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Keesler Air Force Base / Biloxi, MS2 mi76 minN 010.00 miPartly Cloudy76°F70°F84%1006.4 hPa
Gulfport - Gulfport-Biloxi International Airport, MS9 mi21 minN 010.00 miFair73°F70°F90%1006.6 hPa
Moss Point - Trent Lott International Airport, MS20 mi21 minW 310.00 miMostly Cloudy73°F69°F87%1006.6 hPa

Wind History from BIX (wind in knots)
Last 24hrS11S11S14
1 day agoS7E5N4CalmNE6N7NE6NE4N3CalmCalmE4N3CalmSW3W5CalmCalmE4CalmE5NE4E3NE3
2 days agoS4SE5NE6NE6E4E4SE13SE9S7SE3SE7E8S12

Tide / Current Tables for Biloxi, Biloxi Bay, Mississippi
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Wed -- 05:10 AM CDT     Moonrise
Wed -- 05:56 AM CDT     Sunrise
Wed -- 10:37 AM CDT     1.73 feet High Tide
Wed -- 06:39 PM CDT     Moonset
Wed -- 07:48 PM CDT     Sunset
Wed -- 08:05 PM CDT     -0.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Ocean Springs, Mississippi
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Ocean Springs
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Wed -- 05:10 AM CDT     Moonrise
Wed -- 05:56 AM CDT     Sunrise
Wed -- 09:45 AM CDT     1.56 feet High Tide
Wed -- 06:38 PM CDT     Moonset
Wed -- 07:28 PM CDT     -0.26 feet Low Tide
Wed -- 07:48 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southeast    EDIT

Wind Forecast for New Orleans/Baton Rouge, LA (0,6,7,8)
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Ground Weather Radar Station Mobile, AL
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weather_mapweather_map weather_map

Gulf Stream Current

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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.